Stud bolt ASTM A193 B7 -16 "Thread to Thread" Class 2A c/w 2 Heavy Hex Nut ASTM A194 Gr.2H Class 2B

Stud bolt ASTM A193 B7 -16 "Thread to Thread" Class 2A c/w 2 Heavy Hex Nut ASTM A194 Gr.2H Class 2B

Hexagon nut, used in combination with bolts and screws, can be used for fastening machine parts.Type I hexagon nut is the most widely used, class C nut for the surface is relatively rough, accuracy requirements are not high on the machine, equipment or structure;Class A and class B nuts are used on machines, equipment or structures with relatively clean surfaces and high precision requirements.Type II hexagon nut thickness m thicker, more often used for often need to assemble and remove the occasion.Hexagon thin nut thickness m is thinner, more used to be connected parts of the surface space is limited occasions.Classification by tooth distance: standard teeth, normal teeth, fine teeth, very fine teeth and back teeth.

According to the material classification: stainless steel hexagonal nuts and carbon steel hexagonal nuts, copper hexagonal nuts, iron hexagonal nuts.

Classification by thickness: hexagonal thick nuts and hexagonal thin nuts.

Classification by method of use: hot melt copper nut, hot pressure copper nut, embedded copper nut and ultrasonic copper nut

The product of 4140 alloy steel shall meet the following chemical composition standards:

C%   0.38-0.48

Si%   0.15-0.35

Mn%   0.75-1.00

P%   ≤0.035

S%   ≤0.040

Cr%  0.80-1.10

Mo%  0.15-0.25